In view of complexity of nature of procedure and need of use of the special tool and the equipment, service of valves, their saddles and the directing plugs, usually called by klapanny works, should be carried out by the professional mechanic.

to the amateur mechanic on forces there will be a carrying out removal and dismantling of a head of cylinders, implementation of preliminary cleaning and check of a condition of components then again it is necessary to collect and deliver a head for performance of klapanny works in a car-care center workshop. External survey will help you to find out with what condition there are components of a head of cylinders and the klapanny mechanism and to define volume and nature of the forthcoming recovery operations. On the basis of the analysis of available information you can define what replaceable details can be necessary at performance by the expert of procedure of service of valves.

The specialist of dealer office or workshop of car-care center will carry out removal of valves and their springs and will be engaged in restoration or replacement of valves and klapanny saddles, restoration of directing plugs, check of a condition and replacement (in case of need) plates (or rotary support) springs and crackers of cutting locks, replacement of maslootrazhatelny caps of valves, assembly of components and check of adjusting height of klapanny springs. Also, in case of need, stanochny processing of a head for the purpose of restoration of planeness of its interfaced surface will be made. On V8 both engines of a head should be сфрезерованы on identical depth and if the metal layer in thickness more than 0,5 mm is removed, bottom and lateral interfaced surfaces of the inlet pipeline should be processed as appropriate for the purpose of adequate combination of all channels and openings.

The pro-point of klapanny saddles should be made in a car-care center workshop by means of the special machine (see a picture) - centering of a new saddle in relation to directing plug of the valve is made by means of ottsentrovanny on a small beard and a grinding stone having strictly certain form.

Such processing provides absolute planeness of the deformed interfaced surfaces.

After performance by the professional of klapanny works the head should get characteristics new. Before installation on the engine should subject the head returned from a workshop careful cleaning for the purpose of removal of an abrasive and small metal particles which could remain after machining of a head and grinding in of valves. Having used the compressed air, carefully blow all smallest openings, channels and cavities.